The PAN consortium brings together three research groups from University of Geneva in Switzerland, the Perugia section of the Italian National Institute for Nuclear Physics, INFN, and the Institute of Experimental and Applied Physics at the Czech Technical University in Prague, IEAP. The consortium is developing an instrument to precisely measure the flux, composition, and arrival direction of highly penetrating particles in space, in the energy range from 100 MeV/n to 100 GeV/n where there are no experimental data.This penetrating radiation constitutes a radiation hazard of main concern for human travel in space.Energetic particles in space can be emitted by the Sun, as Solar Energetic Particles (SEPs), or by galactic sources, as Galactic Cosmic Rays. Trapped populations are also found in planetary magnetospheres. Precise measurements of their energy spectra and composition in the 100 MeV/n to 20 GeV/n energy range are of great interest to study Solar Modulation of Cosmic Rays, to characterise SEPs, as well as the radiation environment around planets and to improve Space Weather predictions for Deep Space travels. Particles of energies above 100 MeV/n are highly penetrating, thus the only viable detection technique is by a magnetic spectrometer. However magnetic spectrometers in space have currently only be deployed in Low-Earth missions (Pamela and AMS), while all the deep space instruments rely on the dE/dx vs E method, which requires the particle to stop in the detector material. The PAN instrument aims at filling the current observational gap. The design of the PAN instrument is based on a modular magnetic spectrometer of small size, reduced power consumption and weight. This make the PAN instrument suitable for measuring radiation hazards in deep space and interplanetary missions.This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 862044.